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Companies / Health Care / Spyre Therapeutics, Inc.
SYRE

Spyre Therapeutics, Inc.

Health CarePharmaceutical Preparations
Ticker SYREWALTHAM, MAFiscal year ends DecemberBook value per share $12.48Diluted shares 84.3M

Spyre Therapeutics, Inc. (Nasdaq: SYRE) is a clinical-stage biotechnology company developing long-acting antibodies and antibody combinations for inflammatory bowel disease (IBD) and rheumatic diseases. Its investigational portfolio targets α4β7, TL1A and IL-23, with candidates being developed as monotherapies and… From the company’s description.

In fiscal 2025, Spyre Therapeutics, Inc. reported a net loss of $155.20M. Operations used $169.25M in cash.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-09-30
Sales & profitability
$0.00MFY2025
0.00%FY2025
$-155.20MFY2025
+25.4% year over year
Last 12 mo $-263.86M
-21.70%FY2025
+18.5 percentage points
Last 12 mo -25.09%
Cash & financing
$-169.25MFY2025
−7.5% year over year
Last 12 mo $-249.32M
$-169.25MFY2025
−7.5% year over year
Last 12 mo $-249.32M
—
64.1MFY2025
+36.2% year over year
Last 12 mo 84.3M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What Spyre Therapeutics, Inc. does

In the company’s own words

Spyre Therapeutics, Inc. (Nasdaq: SYRE) is a clinical-stage biotechnology company developing long-acting antibodies and antibody combinations for inflammatory bowel disease (IBD) and rheumatic diseases. Its investigational portfolio targets α4β7, TL1A and IL-23, with candidates being developed as monotherapies and paired combinations. SPY001 targets α4β7 for IBD, SPY002 targets TL1A for IBD, SPY003 targets IL-23 for IBD, and SPY072 targets TL1A for rheumatoid arthritis, psoriatic arthritis and axial spondyloarthritis. Combination programs pair these antibody mechanisms for IBD. The company evaluates its IBD candidates and combinations in the SKYLINE Phase 2 platform trial and SPY072 in the SKYWAY Phase 2 basket trial. Spyre’s candidates are designed with extended half-lives and high-concentration formulations to support less frequent subcutaneous maintenance dosing. As of December 31, 2025, the company had 102 full-time employees. Spyre changed its name from Aeglea BioTherapeutics in November 2023 and obtained its core programs through licensing agreements. Its website is https://www.spyre.com.

Company details
Sector
Health Care
Industry (SIC)
Pharmaceutical Preparations
Headquarters
WALTHAM, MA
Fiscal year end
December
CIK
1636282
SIC
2834

Financial performance, year by year

Fiscal 2016–2025 · USD
$-374.54M$-267.28M$-160.03M$-52.77M$54.49M2016201720182019202020212022202320242025Last 12 moLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns Spyre Therapeutics, Inc. — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

285
funds hold it
0 of 35
superinvestors hold it
$2.68B
held by funds, at market
34.3%
of shares held by funds

Largest fund holders · Spyre Therapeutics, Inc.’s weight in each

0.26%of fund net assets
VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.01%of fund net assets
Fidelity Growth Company Fund
FDGRX · Fidelity Mt. Vernon Street Trust
—of fund net assets
iShares Russell 2000 ETF
IWM · iShares Trust
0.20%of fund net assets
1.10%of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

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